epm-reposave

#!/bin/sh
#
# Copyright (C) 2020, 2021  Etersoft
# Copyright (C) 2020, 2021  Vitaly Lipatov <lav@etersoft.ru>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

load_helper epm-sh-altlinux


# under root only
SAVELISTDIR=/tmp/eepm-etc-save
__save_alt_repo_lists()
{
	assure_root
	info "Creating copy of all sources lists to $SAVELISTDIR ..."
	local i
	rm -rf $verbose $SAVELISTDIR 2>/dev/null
	mkdir -p $SAVELISTDIR/apt/ $SAVELISTDIR/apt/sources.list.d/
	for i in /etc/apt/sources.list /etc/apt/sources.list.d/*.list ; do
		[ -s "$i" ] || continue
		local DD="$(echo "$i" | sed -e "s|/etc|$SAVELISTDIR|")"
		cp -af $verbose "$i" "$DD" || fatal "Can't save apt source list files to $SAVELISTDIR"
	done
}

# under root only
__restore_alt_repo_lists()
{
	assure_root
	info "Restoring copy of all sources lists from $SAVELISTDIR ..."
	local i
	[ -d "$SAVELISTDIR/apt" ] || return 0
	mkdir -p $SAVELISTDIR/apt/ $SAVELISTDIR/apt/sources.list.d/
	for i in /etc/apt/sources.list /etc/apt/sources.list.d/*.list ; do
		[ -s "$i" ] || continue
		local DD="$(echo "$i" | sed -e "s|/etc|$SAVELISTDIR|")"
		# restore only if there are differences
		if diff -q "$DD" "$i" >/dev/null ; then
			rm -f $verbose "$DD"
		else
			mv $verbose "$DD" "$i" || warning "Can't restore $i file"
		fi
	done
}

# save and restore repo lists
__on_error_restore_alt_repo_lists()
{
	warning "An error occurred..."
	epm repo restore
}

try_change_alt_repo()
{
	epm repo save
	trap __on_error_restore_alt_repo_lists EXIT
}

end_change_alt_repo()
{
	trap - EXIT
}



epm_reposave()
{
case $PMTYPE in
	apt-*)
		if ! is_root ; then
			sudoepm repo save
			return
		fi
		__save_alt_repo_lists
		;;
	*)
		fatal "Have no suitable command for $PMTYPE"
		;;
esac

}

epm_reporestore()
{
case $PMTYPE in
	apt-*)
		if ! is_root ; then
			sudoepm repo restore
			return
		fi
		__restore_alt_repo_lists
		;;
	*)
		fatal "Have no suitable command for $PMTYPE"
		;;
esac

}

epm_reporeset()
{
case $PMTYPE in
	winget)
		sudocmd winget source reset
		;;
	*)
		fatal "Have no suitable command for $PMTYPE"
		;;
esac

}